296 lines
9.6 KiB
C
296 lines
9.6 KiB
C
/*
|
|
* This file is part of the Micro Python project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013, 2014, 2015 Damien P. George
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include "c_types.h"
|
|
#include "user_interface.h"
|
|
#include "gpio.h"
|
|
|
|
#include "py/nlr.h"
|
|
#include "py/runtime.h"
|
|
#include "modpyb.h"
|
|
|
|
#define GPIO_MODE_INPUT (0)
|
|
#define GPIO_MODE_OUTPUT (1)
|
|
#define GPIO_MODE_OPEN_DRAIN (2) // synthesised
|
|
#define GPIO_PULL_NONE (0)
|
|
#define GPIO_PULL_UP (1)
|
|
// Removed in SDK 1.1.0
|
|
//#define GPIO_PULL_DOWN (2)
|
|
|
|
typedef struct _pyb_pin_obj_t {
|
|
mp_obj_base_t base;
|
|
uint16_t pin_id;
|
|
uint16_t phys_port;
|
|
uint32_t periph;
|
|
uint16_t func;
|
|
} pyb_pin_obj_t;
|
|
|
|
STATIC const pyb_pin_obj_t pyb_pin_obj[] = {
|
|
{{&pyb_pin_type}, 0, 0, PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0},
|
|
{{&pyb_pin_type}, 1, 1, PERIPHS_IO_MUX_U0TXD_U, FUNC_GPIO1},
|
|
{{&pyb_pin_type}, 2, 2, PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2},
|
|
{{&pyb_pin_type}, 3, 3, PERIPHS_IO_MUX_U0RXD_U, FUNC_GPIO3},
|
|
{{&pyb_pin_type}, 4, 4, PERIPHS_IO_MUX_GPIO4_U, FUNC_GPIO4},
|
|
{{&pyb_pin_type}, 5, 5, PERIPHS_IO_MUX_GPIO5_U, FUNC_GPIO5},
|
|
{{&pyb_pin_type}, 9, 9, PERIPHS_IO_MUX_SD_DATA2_U, FUNC_GPIO9},
|
|
{{&pyb_pin_type}, 10, 10, PERIPHS_IO_MUX_SD_DATA3_U, FUNC_GPIO10},
|
|
{{&pyb_pin_type}, 12, 12, PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12},
|
|
{{&pyb_pin_type}, 13, 13, PERIPHS_IO_MUX_MTCK_U, FUNC_GPIO13},
|
|
{{&pyb_pin_type}, 14, 14, PERIPHS_IO_MUX_MTMS_U, FUNC_GPIO14},
|
|
{{&pyb_pin_type}, 15, 15, PERIPHS_IO_MUX_MTDO_U, FUNC_GPIO15},
|
|
// GPIO16 is special, belongs to different register set, and
|
|
// otherwise handled specially.
|
|
{{&pyb_pin_type}, 16, 16, -1, -1},
|
|
};
|
|
|
|
STATIC uint8_t pin_mode[16 + 1];
|
|
|
|
uint mp_obj_get_pin(mp_obj_t pin_in) {
|
|
if (mp_obj_get_type(pin_in) != &pyb_pin_type) {
|
|
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "expecting a pin"));
|
|
}
|
|
pyb_pin_obj_t *self = pin_in;
|
|
return self->phys_port;
|
|
}
|
|
|
|
int pin_get(uint pin) {
|
|
if (pin == 16) {
|
|
return READ_PERI_REG(RTC_GPIO_IN_DATA) & 1;
|
|
}
|
|
return GPIO_INPUT_GET(pin);
|
|
}
|
|
|
|
void pin_set(uint pin, int value) {
|
|
if (pin == 16) {
|
|
int out_en = (pin_mode[pin] == GPIO_MODE_OUTPUT);
|
|
WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | 1);
|
|
WRITE_PERI_REG(RTC_GPIO_CONF, READ_PERI_REG(RTC_GPIO_CONF) & ~1);
|
|
WRITE_PERI_REG(RTC_GPIO_ENABLE, (READ_PERI_REG(RTC_GPIO_ENABLE) & ~1) | out_en);
|
|
WRITE_PERI_REG(RTC_GPIO_OUT, (READ_PERI_REG(RTC_GPIO_OUT) & ~1) | value);
|
|
return;
|
|
}
|
|
|
|
uint32_t enable = 0;
|
|
uint32_t disable = 0;
|
|
switch (pin_mode[pin]) {
|
|
case GPIO_MODE_INPUT:
|
|
value = -1;
|
|
disable = 1;
|
|
break;
|
|
|
|
case GPIO_MODE_OUTPUT:
|
|
enable = 1;
|
|
break;
|
|
|
|
case GPIO_MODE_OPEN_DRAIN:
|
|
if (value == -1) {
|
|
return;
|
|
} else if (value == 0) {
|
|
enable = 1;
|
|
} else {
|
|
value = -1;
|
|
disable = 1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
enable <<= pin;
|
|
disable <<= pin;
|
|
if (value == -1) {
|
|
gpio_output_set(0, 0, enable, disable);
|
|
} else {
|
|
gpio_output_set(value << pin, (1 - value) << pin, enable, disable);
|
|
}
|
|
}
|
|
|
|
STATIC void pyb_pin_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
|
|
pyb_pin_obj_t *self = self_in;
|
|
|
|
// pin name
|
|
mp_printf(print, "Pin(%u)", self->pin_id);
|
|
}
|
|
|
|
// pin.init(mode, pull=Pin.PULL_NONE, af=-1)
|
|
STATIC mp_obj_t pyb_pin_obj_init_helper(pyb_pin_obj_t *self, mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
|
|
static const mp_arg_t allowed_args[] = {
|
|
{ MP_QSTR_mode, MP_ARG_REQUIRED | MP_ARG_INT },
|
|
{ MP_QSTR_pull, MP_ARG_INT, {.u_int = GPIO_PULL_NONE}},
|
|
{ MP_QSTR_value, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL}},
|
|
};
|
|
|
|
// parse args
|
|
struct {
|
|
mp_arg_val_t mode, pull, value;
|
|
} args;
|
|
mp_arg_parse_all(n_args, pos_args, kw_args,
|
|
MP_ARRAY_SIZE(allowed_args), allowed_args, (mp_arg_val_t*)&args);
|
|
|
|
// get io mode
|
|
uint mode = args.mode.u_int;
|
|
|
|
// get pull mode
|
|
uint pull = args.pull.u_int;
|
|
|
|
// get initial value
|
|
int value;
|
|
if (args.value.u_obj == MP_OBJ_NULL) {
|
|
value = -1;
|
|
} else {
|
|
value = mp_obj_is_true(args.value.u_obj);
|
|
}
|
|
|
|
// save the mode
|
|
pin_mode[self->phys_port] = mode;
|
|
|
|
// configure the GPIO as requested
|
|
if (self->phys_port == 16) {
|
|
// TODO: Set pull up/pull down
|
|
} else {
|
|
PIN_FUNC_SELECT(self->periph, self->func);
|
|
#if 0
|
|
// Removed in SDK 1.1.0
|
|
if ((pull & GPIO_PULL_DOWN) == 0) {
|
|
PIN_PULLDWN_DIS(self->periph);
|
|
}
|
|
#endif
|
|
if ((pull & GPIO_PULL_UP) == 0) {
|
|
PIN_PULLUP_DIS(self->periph);
|
|
}
|
|
#if 0
|
|
if ((pull & GPIO_PULL_DOWN) != 0) {
|
|
PIN_PULLDWN_EN(self->periph);
|
|
}
|
|
#endif
|
|
if ((pull & GPIO_PULL_UP) != 0) {
|
|
PIN_PULLUP_EN(self->periph);
|
|
}
|
|
}
|
|
|
|
pin_set(self->phys_port, value);
|
|
|
|
return mp_const_none;
|
|
}
|
|
|
|
// constructor(id, ...)
|
|
STATIC mp_obj_t pyb_pin_make_new(const mp_obj_type_t *type, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
|
|
mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
|
|
|
|
// Run an argument through the mapper and return the result.
|
|
int wanted_pin = mp_obj_get_int(args[0]);
|
|
pyb_pin_obj_t *pin = NULL;
|
|
for (int i = 0; i < MP_ARRAY_SIZE(pyb_pin_obj); i++) {
|
|
if (pyb_pin_obj[i].pin_id == wanted_pin) {
|
|
pin = (pyb_pin_obj_t*)&pyb_pin_obj[i];
|
|
break;
|
|
}
|
|
}
|
|
if (pin == NULL) {
|
|
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "invalid pin"));
|
|
}
|
|
|
|
if (n_args > 1 || n_kw > 0) {
|
|
// pin mode given, so configure this GPIO
|
|
mp_map_t kw_args;
|
|
mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
|
|
pyb_pin_obj_init_helper(pin, n_args - 1, args + 1, &kw_args);
|
|
}
|
|
|
|
return (mp_obj_t)pin;
|
|
}
|
|
|
|
// fast method for getting/setting pin value
|
|
STATIC mp_obj_t pyb_pin_call(mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
|
|
mp_arg_check_num(n_args, n_kw, 0, 1, false);
|
|
pyb_pin_obj_t *self = self_in;
|
|
if (n_args == 0) {
|
|
// get pin
|
|
return MP_OBJ_NEW_SMALL_INT(GPIO_INPUT_GET(self->phys_port));
|
|
} else {
|
|
// set pin
|
|
pin_set(self->phys_port, mp_obj_is_true(args[0]));
|
|
return mp_const_none;
|
|
}
|
|
}
|
|
|
|
// pin.init(mode, pull)
|
|
STATIC mp_obj_t pyb_pin_obj_init(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
|
|
return pyb_pin_obj_init_helper(args[0], n_args - 1, args + 1, kw_args);
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_KW(pyb_pin_init_obj, 1, pyb_pin_obj_init);
|
|
|
|
// pin.value([value])
|
|
STATIC mp_obj_t pyb_pin_value(mp_uint_t n_args, const mp_obj_t *args) {
|
|
return pyb_pin_call(args[0], n_args - 1, 0, args + 1);
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_pin_value_obj, 1, 2, pyb_pin_value);
|
|
|
|
// pin.low()
|
|
STATIC mp_obj_t pyb_pin_low(mp_obj_t self_in) {
|
|
pyb_pin_obj_t *self = self_in;
|
|
pin_set(self->phys_port, 0);
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_pin_low_obj, pyb_pin_low);
|
|
|
|
// pin.high()
|
|
STATIC mp_obj_t pyb_pin_high(mp_obj_t self_in) {
|
|
pyb_pin_obj_t *self = self_in;
|
|
pin_set(self->phys_port, 1);
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_pin_high_obj, pyb_pin_high);
|
|
|
|
STATIC const mp_map_elem_t pyb_pin_locals_dict_table[] = {
|
|
// instance methods
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&pyb_pin_init_obj },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_value), (mp_obj_t)&pyb_pin_value_obj },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_low), (mp_obj_t)&pyb_pin_low_obj },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_high), (mp_obj_t)&pyb_pin_high_obj },
|
|
|
|
// class constants
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_IN), MP_OBJ_NEW_SMALL_INT(GPIO_MODE_INPUT) },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_OUT), MP_OBJ_NEW_SMALL_INT(GPIO_MODE_OUTPUT) },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_OPEN_DRAIN), MP_OBJ_NEW_SMALL_INT(GPIO_MODE_OPEN_DRAIN) },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_NONE), MP_OBJ_NEW_SMALL_INT(GPIO_PULL_NONE) },
|
|
{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_UP), MP_OBJ_NEW_SMALL_INT(GPIO_PULL_UP) },
|
|
//{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_DOWN), MP_OBJ_NEW_SMALL_INT(GPIO_PULL_DOWN) },
|
|
};
|
|
|
|
STATIC MP_DEFINE_CONST_DICT(pyb_pin_locals_dict, pyb_pin_locals_dict_table);
|
|
|
|
const mp_obj_type_t pyb_pin_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_Pin,
|
|
.print = pyb_pin_print,
|
|
.make_new = pyb_pin_make_new,
|
|
.call = pyb_pin_call,
|
|
.locals_dict = (mp_obj_t)&pyb_pin_locals_dict,
|
|
};
|